Paper-bag machine



1,583,393 A. c. COTY PAPER BAG MACHINE original Fi led August 20. 1921 4 Sheet s-Shet 1 anohtoz May 4 1926.

v A. C. COTY PAPER BAG momma Ori inal Filed ugust 20 1921 4 Sheets-Sheet 2 awwwutoz .M-

May 1926.

. PAPER BAG MACHINE Original Filed Au'gust' 20. 1921 4 sheets'sheet 5 4 May '4 192s. 1,583,393

A. c. coTY PAPER BAG MACHINE Original Filed ust 20. 1921 4 Sheets-sheaf;

awwenboz Patented May" 4, 1926.

UNITED STATES ALFRED c. com, or TOLEDO, OHIO, ASSIGNOR TO. THE WATERTOWN BAG 00., 11m, A CORPORATION on NEW YORK.

PATENT OFFICE.

MACHINE PAPER-BAG MACHINE.

Original application filed August 20, 1921, Serial No. 493,872. Divided and this application filed January 3, 1923.

To all whom it may concern:

Be it known that I, ALFRED C. Corr, a citizen of the United States, and a resident of the city of Toledo, in the county of Lucas and State of Ohio, have invented an Improveinent' in Paper-Bag Machines, ;of

which the following is a specification.

This application relates to a cutting-off device for paper-bag machines and is a division of my pending application Serial No.

498,872, filed August 20, 1921, for Appara- -tus for making paper bags. 1

In such apparatus, it is customary to feed a strip of paper froma; roll thereof past paste applying devices and through a former or folder whichforms the strlp into a tube. Thereafter the tube is cut into lengths, and one end of each length is closed. to complete 'a bag. The mechanism (118- closed in this application includes a device for making a preliminary cut in the sheet of paper before it is folded and devices for completing the cut across the sheet after it has been formed into a. tube, in order to complete the severance of the tube into I roper .bag lengths. The subject matter 0 this application relates more particularly to the final cutting operation.

The accompanying drawings show thev parts of the machine which cut the tongue andsever the bag from the tubeinto which the gearing as is necessa to showhowthese parts are actuated. n them,

Figure 1 is a side elevation, broken away, of the part of the machine ,which contains these cutting instrumentalities.

Figure 2 1s a section on the line 2-2 of Figure 6. Figure 3 is a section on the line 33 of the same figure. a Figure 3 is a sectional detail. Figure): is a side elevation detail of the cooperating abutment for the knife which severs the bag from the tube.

Figure 5 is a similar view of the knife which works with the abutment shown in Figure 4. v

Figure 6 is a side elevation of the tube severing knife and abutment and their operating parts. Figure 7 is a vertical section of the shown in Figure 6.

parts aper is'formed and so much of the" sufficient to keep the we Serial No. 610,464.

on" the I line 9-9 12 show thebag in somewhat plainer, I have used in these drawings the same reference characters as are to be found in my prior application. I will first describe the mechanismv in a general way,- forwhich a referencg/to Figure 1 will be sufficient, and then will describe the other figures in detail and .append the claims,

which read u'p'on' these'figures. his to be understood that the general character of the paper bag machine and the combinations therein disclosed are not covered by this case.

In Figure 1, the web 10 of paper is-drawn from the roll 11' and then carried through the pasting mechanism comprising thepasting disc or. roller 12 in a cup or receptacle 42, the web passing' aroundthe roller/l1 against which the pasting disc presses. No claim is addressed to this part of the mechanism in this case. The web 10 then passes through the cutting mechanism '13, the of'- fice of which is to put the tongue on the bag by which it is subse uently manipulated, as shown at 43 in *igure 10. The web then passes over the various guide rolls and a pforrner-, so-called reaching the cut off mechanism shown generally at 1'5,

' whence it passes throu h the set of rollers shown at the left, whic" gives it a tension the knife operates and this action is assisted by the other rollers marked 100 which carry the pinch bars, hereinafter referred to, so

that just at the timeof the cut-ting the web is keptunder tension. As will be'described hereafter, these pinch bars engage slightly straight while before the cut and operate at a little higher speed than the cutting knives so that in the event of an imperfect .cut, the bag is never- Y theless se arated cleanly. This describes the genera order of operation and the particular way'in which the difi'erentappara- 'tuses work will be better understood from the more detailed figures.

I provide an adjustment to vary the relative positions of the cut made by the cut-off ting mechanism 13 from the cut-off mechanism 15 may be adjusted by any desired form of coupling upon the shaft 49 which is not illustrated in this case; the distance between the cut-off end of the tube and the cut made (figures. 8 and 9) by the tongue knife should always be a multiple of the required bag length.

After the tongue is formed, the web passes over the former 14 by which it is shaped in-.

to a-tube and thence through the feed rolls 15, 16 to the cut-off mechanism which cuts the tubes into lengths for forming bags of the desired size. The feed rolls 15, 16 are not claimed in this application and their precise construction is, so far as this case is concerned, unimportant and will not be further described; the tube passes from them to the cut-off mechanism v(Figures 6 and 7) and thence to the pinch bar mechanism which cooperates with e feed rolls 15, 16 to hold the tube in tension for the cut-off operations Referring further to Figures 6 and 7 in particular, the cut-off mechanism comprises parallel shafts 90, 91 driven in synchronism by means of the gears 204, 204 mounted on the shafts, on one side of the machine. These shafts carry two sets of rolls 87 87 arranged in pairs, one on each shaft. The two rolls of each pair are very slightly spaced apart so that, while they grip the paper, they do not hold it tightly, their surface speed being ordinarily greater than that of the paper. The cutting knife 92 is carried by the rolls of the lower set; as there shown, this knife is adjustably mounted in a cross head 93 movable in slots in the rolls, see Figures 2 and 3. A cooperating slotted head or slot bar 94 is similarly carried in the rolls of theupper set. The ends of the 'cross heads 93, 93 project into grooves in stationary cams 95 at opposite sides of the' machine, see -Fig ure"2,.'which illustrates the curve of the roove. These cams are supported on suitable way, as for example by connection with the bracket 95 extending across the machine above the cut off mechanism. As shown in Figure 2, these cams are so de-.

signed that, as the rotation of the shaft brings the knife and itscooperatingabutment or slot bar into operative position to sever the two, a relative movement of translation is provided preferably, the knife 92 and cooperating slotted head 94. move toward each other simultaneously and thus the movement of each'is relatively small and ted head 94'is cut away slightly at the center to an extent equal to the length of the longest tongue cutting knife, as indicated at 98 in Figure 4; by his arrangement, the

tube will be completely severed, but the tongue will not be cut ofl because it is not under tensionand bends downward into the cut away portion 98. Preferably, the movement of translation which'is radially given to the bar and knifeto make the cut brings the slot bar flush with the members 87, while the knife may be given a sufiicient projecting movement to bring it beyond its rolls and enable it to cut effectively. The driving gear of one of the shafts should preferably have a circumferential adjustment relative to'the shaft so as to bring the knife and slot bar into registry.

The pinch bar mechanism 100 holds the tube under tension during the operation of the cutting off knife. It comprises upper and lower parallel shafts 102, 103, see Figures 8 and 9, the lower one of which is supported in fixed bearings 104 and the upper one in bearings 105 which are capable of vertical movement against springs which urge them down to hold the discs 88, 88 :on the several, shafts in contact. The downward movement of the spring box is limited,

as by an adjustable stop screw 113, one of which is shown in Figure 1 and of course a suitable number may be employed to keep the shafts in parallelism. The pinch'bar rolls or discs are arranged in two sets, one on the upper shaft 102 and one on the shaft 103 and are substantially circular in shape but are relieved slightly, as indicated at the several lengths of the paper tube. The. portions of the rolls shown atthe right of the pinch bar in Figure 9 which are operative for this purpose are full size and grip the paper firmly. I

The pinch bars 106, 107 are normally timed toengage the paper slightly before the cut-off knife operates; this results, when the surface speed of these rolls is greater than that of the rolls and 16, in taking up the slack or drawing taut the length .of tube between the bars and feed rolls before the knife cuts; and if the knife fails to cut clean, the greater speed of the pinch bars and rolls also pulls on the tube so as to in- 6 'sure complete severing. When the feed rolls are running relatively. slowly, which. happens with short bags, it is desirable to reduce the period of'time between initial gripping of the pinch bars and the .cutting by the 10\knife and this is done, as shown by making the gear 216 adjustable circ'umferentially on the shaft 102 as by the coupling 216*.

Referring now to Figure 1, provision 1s made by means of the gear 207 carried upon' the arm 211 centered about the gear 209 for changing the speed of the feed. rolls 15 and 16 and thus different lengths of tube may be fed down successive operations of the out off knife as required for making bags of 0 different lengths. I

Figure 10 shows a part of the web 10 after the tongue 43 is cut, and before the webis folded; Figure 11 shows the tongues position after the web is folded and pasted;

- -and Figure 12 shows the web with thecarried respectively by said carriers and means for giving said knife and slot-bar simultaneously a movement of translation toward each other to cut the paper.

2. In a bag making machine. a cut off mechanism comprising opposed rotatable carriers arranged to rotate with a peripheral speed substantially equal to the speed, of thepaper, a knife and a cooperating slotbar movably carried respectively by said carriers and means for giving said knife and slot-bar a movement of translation.

- toward each other relative to the carriers.

In a bag making machine, a cut off mechanism comprising opposed rolls, a cut off knife and a cooperating slot-bar respectively mounted therein for radial movement,

vfixed cams at the ends of said rolls cooperating with the knife andslot-ba'r to move the same simultaneously toward each other at a predeterminedfpoint in-the rotacomprising rotatable carriers with cooperating knife' and slot-bar carried thereby on opposite sides of the paper and suitably timed means for moving said knife and slotbar toward each other to cutthe paper.

5. In a bag making machine,a cut off mechanism comprising feed rolls,pinch.bars arranged to move faster than the'feed rolls and to apply tension toa paper sheet, a

knife mechanism arranged to operate on the paper between the feed rollsand the inch bars while the paper is held in tension t 'iereby, and adjustable means for regulating the degree of tension applied to the paper sheet before the knife mechanism operates to out the paper.

(i. In a bag making machine, a cutoff mechanism comprising feed rol1s,'pinch bars w arranged to grip the paper prior to the moment 'of cutting, a knife n'lechanis'm arranged input the paper between the feed rolls and the pinch bars while the paper is held in tension thereby, said knife mechav,

nism comprising rota-table rolls engaging the paper, together with a cooperating knife member and slotted member carried by said rolls, and suitably timed means for moving said knife member and slotted member to said rolls to .cut the paper. I

7. In a bag making machine, a cut off simultaneously toward each other relatively mechanism comprising feed rolls, pinch bars arranged to grip the paper .prior to the moment of cutting, a knife mechanism arranged to cut the paper between the feed rolls and the pinch bars while the paper is heldin tension thereby, and means for adjusting one of the pinch bars to vary-the" time of gripping the-paperrelative to the time of i cutting.

8. In a bag making machine, a cut off mechanism, comprising feed rolls, pinch bars arranged togrip the paper prior to the moment of cutting, a knife mechanism arranged to cut the paper between the feed rolls and the pinch bars while the paper is held in tension thereby, and adjustable means for regulating the interval between the gripping of the paper and the cutting thereof. r

9. In apparatus for making paper bags, in combination, feed rolls, cooperating knife and slot-bar carrying rolls arranged to rotate at a surface speed greater than that of the feed rolls and spaced to permit slipping relative to a sheet of paper, a knife and a slot-bar movably carried by the respective rolls and means for simultaneously ping relative to a sheet of paper, a knife and a slot-bar movably carried by the respective rolls, and means for simultaneously moving said knife and slot-bar into cooperative cutting relation, one of said rolls being adjustable circumferentially relative to the other.

11.- In apparatus for making paper bags, cooperating rolls, pinch bars carried thereby, one of said pinch bars being adjustable circumferentially to vary the relative time of operation thereof, said rolls being of 'different radii for different portions of their circumferences and so arranged that during one portion of each rotation a paper tube therebetween will be gripped relatively firm- 1y and. during another portion of the rotation the paper tube will be engaged relatively lightly, substantially as-and for. the purpose described;

12. In apparatus for making paper bags,

the combination of feed rolls, out ofi-mechanism and pinch rolls and means for driv ing the pinch rolls at a surface speed greater than that of the feed rolls, one of said pinch rolls being adjustable circumferentially;

13. In apparatus for making paper bags,

bar rolls, and'means for adjusting one of said pinch bars to vary the time of operation thereof with respect to the time of operation of the out OK mechanism.

'14:. In apparatus for making paper bags,--

the combination with feed rolls of inter mittently acting pinch bars a cut oli device Working between the feed rolls, and pinch bars, means for driving the pinch bars at a greater velocity than the feed rolls and for timing the intermittent action of the pinch-bars to hold taut the paper during the operation of the cut off mechanism and tocontinue pulling the paper thereafter to insure complete severing.

In testimony whereof, I have signed my name to this specification this 29th day of Dec.,1922. I 1

ALFRED c. coTY;

a a surface speed lower than that ofthe pinch 

